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Title:
Absorption of gamma-ray jet photons in the external photon fields of a binary supermassive black hole system
Authors:
Donea, Alina C.
Affiliation:
Centre for Stellar and Planetary Astrophysics, School of Mathematical Sciences, Monash University, Victoria 3800, Australia
Publication:
HIGH ENERGY GAMMA-RAY ASTRONOMY: Proceedings of the 4th International Meeting on High Energy Gamma-Ray Astronomy. AIP Conference Proceedings, Volume 1085, pp. 636-639 (2008). (AIPC Homepage)
Publication Date:
12/2008
Origin:
AIP
PACS Keywords:
gamma-ray, Infall, accretion, and accretion disks, Galactic nuclei , circumnuclear matter, and bulges
DOI:
10.1063/1.3076755
Bibliographic Code:
2008AIPC.1085..636D

Abstract

Gamma-ray absorption due to photon-photon pair production of γ-ray jet photons travelling in the external photon environment of a binary supermassive black hole system is considered. We investigate to what extent the location of a gamma-ray emitter exposed to the anisotropic radiation field of both accretion disks affects the gamma-ray opacity. The simple model analysed in this paper consists of a primary black hole surrounded by a standard accretion disk in symbiosis with a relativistic jet. The secondary black hole located at a given position nearby has a similar mass (or smaller) and is surrounded by a viscous Shakura-Sunyaev small accretion disk. We show that for standard parameters of the accretion disks and a separation distance between the two black holes of 0.05 to 0.1 pc (close system), there is still a significant γ-ray absorption from the secondary disk.
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